Sneezewort
Achillea ptarmica · Asteraceae
📷 Ivar Leidus · CC BY-SA 3.0
⚠️ Chiens et chats : fleurs et feuilles irritent tube digestif et voies respiratoires. Humains : contact cause irritation, inhalation de pollen problématique.
The gardener's calendar
Ideal time to plant sneezewort: set it out when the soil is neither frozen nor waterlogged, and water generously as it establishes.
ID card
- Scientific name
- Achillea ptarmica
- Family
- Asteraceae
- Plant type
- Herbaceous perennial
- Adult height
- 60 cm
- Flowering
- June to August
- Foliage
- Deciduous, finely cut
- Hardiness
- Very hardy (zones 3 to 9)
- Origin
- Central and Northern Europe
✓ Taxonomy verifiedSource: AI estimate · hardiness: reliability high.
Expert tips
The key tip
Achillea ptarmica thrives in rich, moist soil, unlike other yarrows; regular division every 3 years prevents exhaustion and rejuvenates the clump. Deadhead spent flowers to extend blooming until September.
The common mistake
Leaving the clump untouched for 5-6 years without division: the center becomes bare, the plant gets sparse and flowering diminishes.
The pro's trick
In spring, take young sections from the outer edges of the clump with a sharp spade; replant them immediately in enriched soil and you'll have vigorous plants within 8-10 weeks.
Seasonal watch
From August to October, powdery mildew can coat the foliage after warm, humid periods.
Care
Light
Sneezewort prefers a sunny location to optimize flowering. However, it tolerates partial shade without compromising its vigor. Choose an airy spot to prevent excessive foliage moisture.
Watering
Water moderately, especially during the growing season and flowering. Once established, this plant is fairly drought-tolerant. Let the soil dry slightly between waterings and avoid wetting the foliage to prevent fungal diseases.
Soil
Sneezewort adapts to most well-draining soils. It prefers rather poor to average soil. Heavy, compact soil should be improved with sand or gravel to ensure good drainage.
Pruning
Remove spent flowers regularly to extend flowering and encourage branching. In late autumn, cut stems back to 10-15 cm from the ground. Light cleanup of damaged foliage in spring helps rejuvenate the clump.
Fertilizing
This undemanding plant requires only moderate nutrient input. A light application of compost or balanced fertilizer in spring is sufficient. Too much fertilization promotes foliage at the expense of flowering.
Diseases and Pests
Sneezewort is generally robust. Watch for possible powdery mildew attacks in stagnant humidity or poor air circulation. Proper drainage and spacing out waterings will limit these issues.
Did you know?
The name "sneezewort" comes from its historical use as a sneezing powder: in the Middle Ages and Renaissance, the dried and ground flowers of this achillea were intentionally inhaled for their irritating properties, used in rituals or simply to clear the nasal passages. Its other popular name, "sneezeweed," perpetuates this savory historical tradition.
Where to buy it
Plant in spring or early autumn, avoiding spells of intense heat. Pick a plant with healthy foliage and roots that are not exposed. Best time: March, April, May, September.
Add this plant to my garden →Plants from the same family
- SunflowerHelianthus annuus
- YarrowAchillea millefolium
- Ox-eye daisyLeucanthemum vulgare
- Canadian goldenrodSolidago canadensis
- WormwoodArtemisia absinthium
- Dyer's chamomileCota tinctoria
Tips generated and checked by Viridia — adapt them to your local climate.